I came across these links when trying to recover a Windows 7 system which had been “upgraded”
We had lost the one admin user password and a shell had been installed in the Admin user.
I logged into the BIOS and added the DVD as a legacy device.
I used the install disk to open up a command window. I then used trick No 4. “Use the Sticky Keys trick to reset the Windows 7, Windows Vista, and Windows XP password” from this article, 12 ways how to reset the Windows administrator password – Windows 7, Vista, Windows XP which takes you to this article, The Sticky Keys Trick. This allowed me to reset the password.
I then downloaded autorunsc which can be run from my emergency cmd shell. ( I downloaded it using a non admin user and copied the files to my emergency directory and run the program from my emergency shell.) It opens as a windows program. I was then able to delete the startup link for the crapware.
I was then able to use the admin user to remove the crapware.
I reset the sticky key program and then deleted the DVD as legacy device.